BUG/MEDIUM: quic: Too short Initial packet sent (enc. level allocation failed)

BUG/MEDIUM: quic: Too short Initial packet sent (enc. level allocation failed)

If the Handshake encryption level could not be allocated, this could lead
to Initial packets to be sent because no Handshake CRYPTO frames were generated.

Furthermore in such an allocation failure case, the connection should be closed
as soon as possible. This is done making ha_quic_set_encryption_secrets() return
0 upon an encryption level allocation failure.

Also fix a typo in the trace in relation to this allocation failure.

No need to be backported.